Thermoplastic urethane elastomers IV. Effects of cycloaliphatic chain extender on dynamic mechanical properties

Autor:	C. G. Seefried, Frank E. Critchfield, J. L. Dodd, J. V. Koleske
Rok vydání:	1975
Předmět:	chemistry.chemical_classification Thermoplastic Materials science Polymers and Plastics Extender General Chemistry Polymer Elastomer law.invention Amorphous solid chemistry.chemical_compound chemistry law Polycaprolactone Materials Chemistry Copolymer Composite material Glass transition
Zdroj:	Polymer Engineering and Science. 15:646-650
ISSN:	1548-2634 0032-3888
DOI:	10.1002/pen.760150903
Popis:	The dynamic mechanical properties of a series of thermoplastic urethane elastomers have been studied as a function of molecular composition and temperature. Polymers based on polycaprolactone diol, an isomeric mixture of tolylene diisocyanate and hydrogenated Bisphenol-A as the chain extender were prepared at various relative concentrations of hard and soft segments. The glass transition temperatures of these polymers progressively shifted to higher temperatures as the relative hard segment content was increased. This variation was accurately described by the Fox relationship for amorphous copolymers. These results can be interpreted in terms of the relative degree of segregation between the segment of the block copolymers.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5d45a3f7e490ca9583cb8bcb9bd9b604 https://doi.org/10.1002/pen.760150903 Zobrazit plný text záznamu Plný text